Paris Hilton has slammed the ad campaign by Ford depicting a cartoon version of herself taking Kim, Khloe, Kourtney Kardashian hostage in the boot of a car as "stupid".

The controversial publicity stunt reportedly made by the India unit of Ford Motor Co. shows the blonde heiress sitting in the front seat and winking while the siblings are gagged and tied up in the back.

Paris has insisted that she is friends with the Kardashians despite rumours of a rift (WENN)

Quizzed on the ad, Paris hinted that her rift with Kim was over when she referred to the reality star as her friend, before labelling it stupid.

"It’s my friends so I think it’s really stupid," she told TMZ as she made her way through LAX airport on Sunday.

Paris and Kim were once close friends, however according to the Mail Online the two fell out once Kim’s fame from her notorious 2007 sex tape with singer Ray J and the success of her reality show Keeping Up With The Kardashians began to eclipse Paris’ fame.

The ad, which has been called "disgusting" by the Kardashians was part of a tasteless campaign featuring celebrities being kidnapped by their rivals.

Speaking on behalf of the Kardashian family, an attorney told E! News that "[the] Ford ads are disgusting, vile and offensive to all women. It is unacceptable that Ford would align itself with an ad agency that would so carelessly release these ads."

Explaining that the sisters "do not take this lightly and they are exploring all of their legal options."